8999666 has 8 divisors (see below), whose sum is σ = 14537964. Its totient is φ = 4153680.

The previous prime is 8999651. The next prime is 8999671. The reversal of 8999666 is 6669998.

It can be written as a sum of positive squares in 2 ways, for example, as 6911641 + 2088025 = 2629^2 + 1445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8999666² = 161987976223112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173045 + ... + 173096.

Almost surely, 2^8999666 is an apocalyptic number.

8999666 is a deficient number, since it is larger than the sum of its proper divisors (5538298).

8999666 is a wasteful number, since it uses less digits than its factorization.

8999666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346156.

The product of its digits is 1259712, while the sum is 53.

The square root of 8999666 is about 2999.9443328169. The cubic root of 8999666 is about 208.0058091326.

The spelling of 8999666 in words is "eight million, nine hundred ninety-nine thousand, six hundred sixty-six".